Improvement in nut-locks



P. HALDEMAN &--A. J. STEWART.

I NUT-LOCK.

No.181,166, Patented Aug.15,' 18 76.

WITNESSES NV JV TOR @WM4 ai x fktww Attorney N.PETERS. PHOTO-LITHOGRAPNER, WASHINGTON. D. C,

UNITED STATES PATENT OFFICE PETER S. HALDEMAN AND ANDREW J. STEWART, OF SMITHFIELD, PA.

. IMPROVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 131,166, dated August 15, 1876; application filed Jul 17,1876.

To all whom it may concern o Be it known that we, PETER S. HALDEMAN and ANDREW J. STEWART, of Smithfield, in

the county of Fayette and State of PennsyL.

vania, have invented certain new and useful Improvements in Nut-Locks; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

The nature of our invention consists in the construction and arrangement of a nut-lock, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which our invention appertains to make and use the same, we will now proceed to describe its construction and operation, referring to the accompanying drawing, which fully illustrates our invention.

A represents an ordinary bolt, and B is the nut for the same.

To form our nut-lock we drill a hole through the nut and bolt, so as to out half the size in the bolt, and then file away the thread on the bolt for a certain distance, leaving, as it were, a recess, a, in one side of the bolt A. To lock the nut on the bolt we use a double springbolt, 0, with square shoulders I) b at each side.

The sides-from the shoulders taper to a sharp after removing the spring-bolt, and then looked again. To remove the spring-bolt the points are pressed together and then pushed back.

Having thus fully described our invention, what we claimas new, and desire to secure by Letters Patent, is-

' The combination of the grooved nut B, re-

eessed bolt A, and the double spring-bolt 0, provided with the head D, shoulders I) b, and points d d, substantially as and for the purposes herein set forth.

In testimony that we claim the foregoing as our own We do affix oursignatures in presence of two witnesses.

' PETER S. HALDEMAN. ANDREW J. STEWART. 

